the x board
When BE tried to save money on the Revs that pulled out a capacitor which made them cheaper but also gave them a lag, from when the sensor kicked to the servo spinning. This new board has taken care of that and speeds up the rev. they say its better then the pre-BE revs. I haven't gotten one yet (keep meaning to order one) Warpig just did a test on all the major loaders that are out and the x-board did work better then the older BE revs...
oh yeah and it fixes sun issues too.
-TC